[Zope-dev] Date Time Problem

Hi, another problem occured: I got the script working, which gives me certain values back from the catalog. But this Time thing still doesnt work ! i have tried nearly everything. I use the procedure described in the zope book, but it doesnt work. return context.cata({'content' : id, 'date' : DateTime()-7, 'date_usage' : 'range:min', }) I always get back all catalog items. Has anyone ever expierienced the same problem ? If yes, please help me, i dont know how to proceed .... thanx Sebastian